Edward knew Adonis' first name, but he had never heard him mention his last name. No one at the tower knew of Adonis' true identity as the prince of Mara and a true royal.
By the time he left the headquarters of the City Defense Force, Edward had already reached a cooperation agreement with Hans. They both believed that the goal behind the conspiracy should be the Coronation Ceremony that was taking place in seven days. Through Edward's encouragement and his own suspicions, Hans had developed a deep belief that Adonis was involved with the incidents.
According to Hans, the entire palace had been tightly sealed by the King's Guards. Furthermore, when the king's will and successor had been announced the previous day, neither Hans nor any of the other nobles and royals had been permitted into the palace.